Sequence of canal instruments for executing an endodontic operative procedure

ABSTRACT

Sequence of canal instruments for performing an endodontic operating protocol, of the type comprising several, for example three, instruments used in sequence, said instruments being of the type with three cutting blades, the instruments being of progressive conicity, for example 6%, 4% and 2%, and each having an identical progressive pitch, characterized in that the pitch increases progressively as a function of the conicity.

[0001] The present invention relates to a sequence of canal instruments for performing an endodontic operating protocol, of the type comprising several, for example three, instruments used in sequence, said instruments being of the type with three cutting blades, the instruments being of progressive conicity, for example 6%, 4% and 2%, and each having an identical progressive pitch.

[0002] Sequences of canal instruments of this type are already known.

[0003] The instruments with progressive pitch are such that the pitch increases from the apex towards the handle, which prevents screwing of the instrument in the tooth in. the case of continued rotation.

[0004] The increase in the pitch leads to a reduction in the residual core of the instrument, hence increasing its reliability.

[0005] This provides an acceptable flexibility for a conicity of 2%, but more and more reduced flexibility as the conicity increases.

[0006] The invention proposes to solve this problem by providing a sequence of canal instruments for performing an endodontic operating protocol, of the type comprising several, for example three, instruments used in sequence, said instruments being of the type with three cutting blades, the instruments being of progressive conicity and each having an identical progressive pitch, characterized in that the pitch increases progressively as a function of the conicity.

[0007] Advantageously, this progressive conicity will be 6%, 4% and 2%.

[0008] Thus, by way of example, but without limitation, the following can be provided:

[0009] a pitch ×for a conicity of 2%

[0010] a pitch 1.5×for a conicity of 4%

[0011] a pitch 2×for a conicity of 6%

[0012] the progression of the pitch of each instrument increasing from the apex to the handle.

[0013] In certain cases this makes it possible to simplify the operating sequence, for simple canals, by omitting one canal instrument, for example by bringing an instrument with a conicity of 4% as far as the apex. 

1. Sequence of canal instruments for performing an endodontic operating protocol, of the type comprising several, for example three, instruments used in sequence, said instruments being of the type with three cutting blades, the instruments being of progressive conicity and each having an identical progressive pitch, characterized in that the pitch increases progressively as a function of the conicity.
 2. Sequence of canal instruments according to claim 1, characterized in that the progressive conicity is 6%, 4% and 2%.
 3. Sequence of canal instruments according to either of claims 1 and 2, characterized in that the pitches are as follows: a pitch ×for a conicity of 2%, a pitch 1.5×for a conicity of 4%, a pitch 2×for a conicity of 6%, the progression of the pitch of each instrument increasing from the apex to the handle. 